Group 1

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3.3 f. Activity

1. Cafe News - with Peter Merrell and Rick Richter

Questions:

• What is the trigger that starts the machine?
  
  
  • The pulling of the coffee cup yanks a cord.
• How many different forms of energy are used to operate the machine? Provide statistics.
  • Mechanical, 13 instances
  • Thermal, 3 instances
  • Chemical, 6 instances
  • Electrical, 1 instance

• What is the most important form of energy used by the machine?
  • The most important form of energy used by the machine is mechanical energy. The interplay between potential and kinetic energy drives the function of the machine primarily.